Rotary switch

ABSTRACT

A digital camera includes a rotary switch, a switching unit, and a switching unit. The switching unit switches between two states independently of a function other than functions assigned to the respective states of the rotary switch, the two states including a restricted state where rotation of the rotary switch is restricted with a clicking feel and a function of at least one of a shutter speed and an aperture as a function with discrete output values is related to the rotating operation of the rotary switch and a non-restricted state where rotation of the rotary switch is not restricted and a function of at least one of focusing, and a zoom magnification of a lens, and similar function as a function with continuous output values is related to the rotating operation of the rotary switch.

CROSS-REFERENCE TO RELATED APPLICATION

This application is a continuation application and thus claims benefitpursuant to 35 U.S.C. §120, of U.S. patent application Ser. No.14/599,397, which is a continuation application of International PatentApplication PCT/JP2013/069228 filed on Jul. 14, 2013, which is basedupon and claims the benefit of priority from the prior Japanese PatentApplication No. 2012-159132, filed on Jul. 18, 2012, the entire contentsof which are incorporated herein by reference.

TECHNICAL FIELD

The present invention relates to a switch that allows switching tactilesenses for an electronic device, in particular, relates to a switch thatallows achieving an output of discrete values and an output ofcontinuous values by switching the outputs using one switch (dial) in adigital camera.

BACKGROUND ART

In recent years, digital cameras are becoming popular. The digitalcamera takes an image using an imaging device such as CCD and CMOSsensors, and saves image data of the taken image in a memory card builtinto the chassis. In these digital cameras, a lot of functions such asfocusing, zooming, exposure, a shutter speed, ISO (sensitivity), andswitching of imaging modes are electronically controlled.

Typically, the digital camera has a plurality of functions processed bya program, and needs many operations to select and set various itemsincluded in each function. For these operations, many external operatingportions, for example, buttons are disposed on the surface of thechassis. However, when the external operating portions are disposedcorresponding to the number of items or settings in each function, thenumber of components for the operating portions is increased. Thiscauses a large-size chassis of the camera and complicated operations.Accordingly, there is an appropriate upper limit for the number of theexternal operating portions.

In the digital camera in the present situation, to realize multiplefunctions using a small number of buttons, on an operation screen, aplurality of hierarchies is set, multiple functions are realized using acombination of a plurality of buttons, and different functions for eachmode are assigned to the same button.

Patent Document 1: JP-A-2004-69783

Patent Document 2: JP-A-2002-72051

Patent Document 3: JP-A-2002-101324

In the digital camera described in Patent Document 1, for example, thefunction of focusing is assigned to an endless circulation operatingportion in an imaging mode, and the function of a frame-by-frame controlis assigned in a playback mode.

In the video camera described in Patent Document 2, one rotary ringfunctions as a manual focus operation ring in a manual focus mode whilefunctioning as a manual zoom operation ring when the mode is switched toan autofocus mode.

In the digital camera described in Patent Document 3, a plurality offunctions is assigned to an operation dial. The instruction of theweakened or strengthened clicking feel during a turning operation of theoperation dial in an imaging mode or a playback mode is given.

In the digital cameras in Patent Document 1, Patent Document 2, andNon-Patent Document 1, a plurality of functions is assigned to oneoperation ring and the operability of this operation ring is the same.In the digital camera in Patent Document 3, while the operating forceamount is different, again, a plurality of functions is assigned to oneoperation dial with a clicking feel.

Through the observation by the inventor, the target values for thefunction to be set in the electronic device might be discrete values (oritems) or continuous values. For example, as the function of the digitalcamera, the discrete values include a shutter speed, an aperture, animaging scene (for example, a night scene or a portrait), and similarvalue. The continuous values include zooming, focusing, and similarvalue.

In the case where the control of the function to be targeted iscontrolled by a rotatable ring (or a dial) in a circular shape, it hasbeen found that the operability is improved by use of a ring whoserotation is locked in a specific position when the discrete values aretargeted and by use of a dial that continuously rotates when thecontinuous values are targeted.

However, in the conventional digital camera, when a ring is preparedcorresponding to the output value of the function to be targeted. It isnecessary to provide a plurality of types of rings in the digitalcamera. Depending on the provided type of the ring, the function to beassigned is limited. As a result, this has been causing limitations onthe number, the arrangement, and the use feeling of the externaloperating portions.

SUMMARY OF INVENTION

According to one or more embodiments of the present invention, alens-integrated digital camera includes a rotary switch, a switchingunit, and a restricting member. The rotary switch is disposed at a mainbody. The rotary switch has a surface with a plurality of depressedportions or trough portions. The switching unit is configured toindependently switch between two states. The two states include arestricted state where rotation of the rotary switch is restricted and anon-restricted state where rotation of the rotary switch is notrestricted. The restricting member is configured to engage with thedepressed portion or the trough portion of the rotary switch a casewhere the restricted state is set by the switching unit so as torestrict rotation of the rotary switch. At least one of a shutter speedand an aperture as a function with discrete output values is assigned tothe restricted state, and at least one of focusing and a zoommagnification of a lens as a function with continuous output values isassigned to the non-restricted state. Further, a rotating operation ofthe rotary switch causes an output corresponding to a function assignedto a state selected by the switching unit to a digital camera system,and the digital camera system controls the discrete function or thecontinuous function corresponding to the output.

Furthermore, according to the lens-integrated digital camera, at leastone of an exposure value, an imaging mode, an item of a function,frame-by-frame playback of images displayed in a list of photographedimages, and a page turning when a photographed image is displayed, asfunctions with discrete output values can be further assigned to therestricted state. Additionally, at least one of functions withcontinuous output values like a magnification when a photographeddisplay image is zoomed can be assigned to the non-restricted state.

Furthermore, in the non-restricted state, at least one of focusing and azoom magnification of a lens is selectable, and in the restricted state,at least one of a shutter speed and an aperture is selectable.

Furthermore, the rotary switch is rotatably mounted in a peripheral areaof a lens-barrel.

Furthermore, the switching unit enables switching from an operationscreen.

Furthermore, the switching unit is configured to perform switching by anoperation of pressing the rotary switch into a chassis side or pullingthe rotary switch.

A lens-integrated digital camera includes a ring-shaped rotary switch, aselector switch, a restricting member, a display instrument, and amemory. The rotary switch is mounted on a main body in a peripheral areaof a lens-barrel to be rotatable in the peripheral area of thelens-barrel. The rotary switch has a plurality of depressed portions ina surface portion that is not exposed to an outside of the camera in therotary switch. The selector switch is disposed in a vicinity of thelens-barrel on a surface of a chassis. The selector switch is configuredto independently switch between two states. The two states include arestricted state where rotation of the rotary switch is restricted and anon-restricted state where rotation is not restricted. The restrictingmember is configured to restrict rotation of the rotary switch by beingbiased by the depressed portion due to a pressing force of a spring,corresponding to a switching operation to the restricted state by theselector switch. The display instrument is configured to display a valuecorresponding to a function assigned to a state selected by the selectorswitch. The memory is configured to store a value corresponding to anoriginal state before switching when the selector switch switchesbetween the restricted state and the non-restricted state. At least oneof a shutter speed and an aperture as a function with discrete outputvalues is assigned to the restricted state. Besides, at least one offocusing and a zoom magnification of a lens as a function withcontinuous output values is assigned to the non-restricted state.Further, an operation of the rotary switch causes an outputcorresponding to a function assigned to a state selected by the selectorswitch to a digital camera system, and a control of the discretefunction or the continuous function corresponding to the output isperformed in the digital camera system.

An electronic device includes a rotary switch, a switching unit, and arestricting member. The rotary switch is disposed at a main body. Theswitching unit is configured to independently switch between: arestricted state where an operation of the rotary switch causes aclicking feel; and a non-restricted state where an operation of therotary switch does not cause a clicking feel. The restricting member isconfigured to give a clicking feel in rotation of the rotary switch by aplurality of fitting structures that allows transition and is disposedbetween the restricting member and the rotary switch, in a case wherethe restricted state is set by the switching unit. A function withdiscrete output values is assigned to the restricted state, and afunction with continuous output values is assigned to the non-restrictedstate. Further, an operation of the rotary switch causes an outputcorresponding to a function assigned to a state selected by theswitching unit to an electronic device system, and a function with acontinuous output or a function with a discrete output corresponding tothe output is controlled in the electronic device system.

According to one or more embodiments of the present invention, functionscorresponding to both discrete values and continuous values can beapplied to one switch. This allows reducing the number of buttons. Inthe case where one or more embodiments of the present invention isprovided to the peripheral area of a lens-barrel so as to switch shutterspeeds and exposure values, handling is the same as that of aconventional lens with an adjusting mechanism for both functions. Thisensures the compatibility between convenience and downsizing.

BRIEF DESCRIPTION OF THE DRAWINGS

FIGS. 1A and 1B are schematic configuration diagrams illustrating afirst embodiment where the present invention is applied to a digitalcamera.

FIGS. 2A to 2D are conceptual diagrams illustrating the main part of thefirst embodiment.

FIGS. 3A and 3B are conceptual diagrams illustrating a restrictionmechanism according to a second embodiment.

FIG. 4 is a flowchart illustrating an operation according to the firstembodiment.

FIG. 5 is a flowchart illustrating an operation according to amodification of the first embodiment.

FIGS. 6A and 6B are conceptual diagrams illustrating the main part ofthe second embodiment where the present invention is applied to adigital camera.

FIGS. 7A to 7D are schematic configuration diagrams illustrating a thirdembodiment where the present invention is applied to a digital camera.

FIGS. 8A and 8B are examples of a control ring, to which the presentinvention is applicable, for a digital camera.

FIGS. 9A to 9C are diagrams illustrating a fourth embodiment where thepresent invention is applied to a waveform monitor.

DESCRIPTION OF PREFERRED EMBODIMENTS Embodiment 1

FIGS. 1A and 1B illustrate a first embodiment of the present invention.FIG. 1A illustrates a front view of a digital camera according to thefirst embodiment. FIG. 1B illustrates a top view of the digital cameraaccording to the first embodiment. With reference to FIG. 1A, a rotaryring 103 as a feature of the present invention is disposed in a frontface portion of a digital camera 100 so as to rotatable at the outerperiphery of a lens-barrel 102 including a lens 117 for taking an imagein a chassis 104 of a digital camera 100. A selector switch 105 forswitching a mode for continuous or discrete output values in the rotaryring 103 is disposed in the vicinity of the rotary ring 103.Furthermore, a shutter 101 for photographing, a power switch 108 forswitching ON/OFF of a power supply, an imaging mode, or a playback mode,and a function button 109 for further mode switching are disposed on theouter surface of the chassis 104. Other photographing mechanisms andsimilar member are the same as those in the conventional digital camera,and will not be further elaborated here. Here, the discrete values donot only mean that the actual output values from an encoder arediscrete, but also include discrete values (for example, an apertureF-number, a shutter speed, and similar value) that are recognized as acomputation result by a user.

FIG. 2A illustrates a part of the cross section cut along the line (adashed arrow A in FIG. 1A) passing through the center portion of thelens-barrel 102 on the front face side of the digital camera 100. Therotary ring 103 is set to be smoothly rotated by a rotation mechanism118, here, a ball bearing disposed between the rotary ring 103 and thechassis 104. The rotation angle, the rotation direction, and therotation speed of the rotary ring 103 are detected by a rotary encoder(not illustrated) disposed at the rotary ring 103. Here, the detectionsof the rotation angle and the rotation direction or similar detectionmay employ well-known other methods. Here, a usable method for fixingthe lens-barrel 102 to the chassis 104 can be simply designed by amethod well-known to those skilled in the art, and will not be furtherelaborated here. Within the chassis of the selector switch 105, a fixedportion 106 coupled to the selector switch 105, a restricting portion107 coupled to the fixed portion 106 via a spring 111, and means (notillustrated) for fixing the position of the selector switch 105 (and thefixed portion 106) during switching is disposed.

FIG. 2B to FIG. 2D illustrate structures of the rotary ring 103 viewedfrom the inside of the chassis (in an arrow B direction in FIG. 2A). Atan outer periphery 103 b of the rotary ring 103, projecting portions 201in circular shapes are evenly disposed. When the selector switch 105 isin a non-restricted state (in this case, the output values are analog orcontinuous values), the user can rotate the rotary ring 103 via an outerperiphery 103 a without particular restriction on the rotating state ofthe rotary ring 103.

FIG. 3A and FIG. 3B are respective conceptual diagrams illustrating theoperation when the selector switch 105 is set to a restricted state (inthis case, the output values are digital or discrete values). Inconjunction with movement of the selector switch 105, the fixed portion106 moves to approach the rotary ring 103 inside the chassis 104. Thefixed portion 106 includes the restricting portion 107 that is projectedby the spring 111. When the rotary ring 103 is rotated, the rotary ring103 is fixed in a rough position between the projecting portions 201FIG. 3A. When the restricting portion 107 has a positional relationshipother than the trough with respect to the projecting portions 201 likeFIG. 3B, a restriction is imposed such that the restricting portion 107moves to the closest trough position by the pressing force of the spring111 disposed between the fixed portion 106 and the restricting portion107. Causing the clicking feel to the user when the restricting portion107 is positioned in this trough position improves the convenience ofthe user. The shapes of the distal end of the restricting portion 107and the projecting portion 201 employ the circular shapes as an example.However, any structure is possible insofar as the rotary ring 103 isrotatable and the restricting portion 107 can be arranged in the troughposition in the structure. When the restricted state and thenon-restricted state are switched by the selector switch 105, the lastoutput value in the original state is stored in a memory as a value ofthe original state and the output value from the rotary encoder of therotary ring 103 is output as the output value of the functioncorresponding to a new function.

FIG. 2C illustrates a modification of the rotary ring 103. In thisexample, depressed portions 202 are discretely disposed at the outerperiphery 103 b of the rotary ring 103. In this case, the rotary ring103 rotates continuously in the portion where the depressed portion 202and the restricting portion 107 are not in contact with each otherduring rotation. In the portion where the depressed portion 202 and therestricting portion 107 are in contact with each other, the restrictingportion 107 is fixed in the most stable position against the pressingforce of the spring. As the application of this modification, discretevalues in the positions of the depressed portions 202 and continuousvalues between the depressed portions 202 may be output as outputvalues.

While in FIG. 2C the depressed portions 202 are discretely disposed onthe outer periphery 103 b, the depressed portions 202 may be disposedevenly adjacent to one another at the outer periphery of the rotary ring103. While in FIG. 2B the projecting portions 201 are disposed evenlyadjacent to one another at the outer periphery of the rotary ring 103,the projecting portions 201 may be discretely disposed at the outerperiphery 103 b of the rotary ring 103. The designer may freely designthe configuration among these configurations corresponding to thefunction applied to the rotary ring 103. The intervals between theadjacent depressed portions 202 or projecting portions 201 can becomegradually large or gradually small corresponding to the applied functionsuch that the operator can intuitively operate the applied function.Furthermore, the configuration where a part of the projecting portions201 can be housed within the rotary ring 103 not to be in contact withthe restricting portion 107 may be employed such that the intervals canbe adjusted by an operation of the user or by a program built into thedigital camera.

While in the above-described embodiment the selector switch 105 is theswitch that functions by a mechanical operation, the present inventionis not limited to this. It is possible to employ the configuration whereswitching is set from an operation setting screen of the digital camera.As one example of this case, the selector switch 105 is not disposed onthe front face of the digital camera 100 while an actuator for movingthe fixed portion 106 or similar member is disposed within the chassis104. The actuator is operated corresponding to the mode set on thesetting screen, so as to move the restricting portion 107 to arestricting position or a non-restricting position of the rotary ring103. Separately from the setting on the setting screen, it is possibleto employ the configuration where this actuator control is operated by abutton or similar member disposed outside.

Furthermore, depending on the function to be applied, it might bepreferred to have a limitation on the rotation direction (for example,the case where aperture values are written at the outer periphery of therotary ring 103 and where the minimum F-number and the maximum F-numberare adjacent to each other). In this case, it is possible to employ theconfiguration to avoid a trouble by a method where a protrusion 203 issimply disposed at the outer periphery of the rotary ring 103 and thisprotrusion is brought into contact with the fixed portion 106 so as torestrict further rotation, or by the following configuration. Forexample, means for detecting the rotation direction of the rotary ring103 is disposed. If further rotation causes a trouble with the outputvalue, when further rotation in the direction where a trouble occurs isdetected, the fixed portion 106 is brought closer to the rotary ring 103such that the restricting portion 107 cannot climb over the projectingportion 201. Rotation restricting means is not limited to theconfiguration in this embodiment, and may employ another well-knownmethod.

In this embodiment, the discrete values include shutter speeds, exposurevalues, imaging modes, items of the function, frame-by-frame playback ofimages displayed in a list of photographed images, page turning whenphotographed images are displayed, and similar value. The items of thefunction or similar value may be changed in combination with anotherbutton or similar member. The continuous values include focal positions,zoom magnifications of the lens, magnifications when a photographeddisplay image is zoomed, and similar value. Further, as discrete values,it is possible to use the case where the zoom magnifications of the lensare steps like ×2, ×4, and ×10, the case where the zoom magnificationsof display are steps, and similar case.

Next, a description will be given of an actual operation example usingFIG. 4. Firstly, the power supply is turned on by the power switch 108(in S100). Next, the rotating state of the rotary ring 103 is detected(in S200). Subsequently, regarding the rotation angle, the rotationspeed, the rotation amount, and similar parameter when the rotation isdetected, the needed value is measured. Subsequently, the state of theselector switch 105 is detected (in S300), and then the state of thefunction button 109 is detected (in S401 and S402). In the case wherebath the selector switch 105 and the function button 109 are set, thedigital camera 100 determines that the function of the rotary ring 103is the “aperture.” Then, the current value related to the aperture valueis read out from the memory (in S501). In the case where this operationis the first operation, an initial value is stored in the memory.Subsequently, an aperture mechanism is controlled corresponding to theoutput value of the rotary ring 103 (in S601). Subsequently, the changedaperture value is stored in the memory (in S701). Then, the digitalcamera system causes the control to proceed to S200 for detectingrotation of the rotary ring. The digital camera system controls ashutter speed control (in S502 to S702), a zoom-motor drive control (inS503 to S703), and a focus mechanism control (in S504 to S704)corresponding to the states of the selector switch and the functionbutton, similarly to the aperture mechanism control. In the case wherethe discrete values are stored, not the values calculated from theencoder disposed at the rotary ring hut the discrete values computedfrom the calculated values (for example, F-numbers of F1.4, F2, F3.5,F4, F5.6, F8, and similar value in the case of the aperture) are stored.In the case where continuous values are switched to discrete values, thepositions where the restricting means is inserted are computedcorresponding to the stored discrete values. In the case wherecontinuous values are stored, the values that are calculated from theencoder disposed at the rotary ring and correspond to the function arestored. In the case where discrete values are switched to continuousvalues, the positions where the restricting means is pulled are set tothe positions of the values stored in storage means. Here, one functionbutton is disposed. However, the function button can be removedcorresponding to the number of functions. Furthermore, a plurality offunction buttons may be disposed. At this time, the aperture, theshutter speed, the zooming, and the focusing are assigned as therespective functions. Needless to say, the function to be assigned canbe designed as necessary. Displaying the currently assigned functiontogether with the output value of the currently assigned function on afinder or a liquid crystal display instrument s convenient for the userto easily recognize the current function assigned to the ring.

Next, a modification of the process described in FIG. 4 will bedescribed in FIG. 5. In recent years, a DMF (direct manual focus)function has been adopted to digital cameras that employ autofocus. Inthe DMF function, autofocus operates by half-pressing the shutter 101and the user finely adjusts the focus by manual operation afterautofocusing is done. In the process in the diagram, even in the casewhere the zoom function is originally assigned to the rotary ring, whenhalf-pressing of the shutter is detected in the control sequence, thecontrol is performed as if the function assigned to the rotary ring isthe focus function. In the case where the selector switch iselectronically controlled, the function of the rotary ring may employ,for example, the focus function as described above regardless of thestate of the selector switch when the shutter half-pressing is detected(in the case where the focus function is assigned, it is convenient toremove the restriction regardless of the state of the selector switch asa setting). With this embodiment, a plurality of functions can beassigned to the operation ring disposed in the outer peripheral portionof the lens-barrel. This allows achieving the operational feeling equalto that of a conventional single-lens reflex camera, thus allowingintuitive operation by the user.

Embodiment 2

FIGS. 6A and 6B illustrate the outline of the main part according of asecond embodiment according to the present invention. In the diagram,only a part of a chassis 604 and the main configuration of a rotary ring603 on the front face of a digital camera are illustrated, and the otherconfigurations such as a lens are omitted. In this embodiment, therotary ring 603 is disposed in the front face portion of the chassis604. The rotary ring 603 is configured to be rotatable and movable backand forth in the whole panel of the chassis 604. In an ordinary state,the rotary ring 603 is pressed toward the inside of the chassis 604 (asillustrated by an arrow C) by a spring (not illustrated) or similarmember. In this embodiment, a restricting portion 607 is fixed whilebeing pressed by a spring to approach the rotary ring 603.

In the ordinary state, as illustrated in FIG. 6A, an inside peripheraledge 603 b is not in contact with the restricting portion 607.Accordingly, the rotation of the inside peripheral edge 603 b is notrestricted. The user can continuously rotate the rotary ring 603. For atransition to a restricted state, as illustrated in FIG. 6B, the userfirstly performs the operation for pulling an outside peripheral edge603 a of the rotary ring 603 from the chassis 604 in an arrow Ddirection. At this time, a switch of a detection switch 608 is pressed.Accordingly, the camera system recognizes that the user performs apulling operation and then the pulling operation for the restrictedstate is performed. This pulling operation causes the inside peripheraledge 603 b and the restricting portion 607 to fit each other. Therestriction mechanism between the inside peripheral edge 603 b and therestricting portion 607 can be performed similarly to Embodiment 1described above. Another well-known restriction mechanism may be used.Here, disposing a taper whose diameter shrinks toward the chassis 604 inthe outside peripheral edge 603 a is convenient for the user to easilypull the rotary ring 603. Also, to easily cause the restricting portion607 and the inside peripheral edge 603 b to fit each other, it isconvenient to dispose a taper in one of these portions or in the contactportion between both the portions.

Embodiment 3

FIGS. 7A to 7D illustrate conceptual diagrams of a third embodimentaccording to the present invention. A rotary dial 703 according to thepresent invention is disposed in the vicinity of a liquid crystaldisplay portion 701 on the back face of a digital camera. In the centerof the rotary dial 703, a button 709 for determining an operation isdisposed. A restricted state and a non-restricted state can be switchedby pressing the surface of the rotary dial 703 in the inward direction(illustrated by an arrow E) of a chassis 704.

A description will be given of the operation of the rotary dial 703 inthis embodiment with reference to FIG. 7A to FIG. 7D. FIG. 7Aillustrates one surface where the rotary dial 703 is arranged in thecamera. FIG. 7B illustrates the configuration of the rotary dial 703 inan ordinary state. The rotary dial 703 is fixed to the chassis 704 via aspring 710 such that the rotary dial 703 can be pressed into the chassis704. Near the inferior surface of the rotary dial 703, a restrictingportion 707 and a fixed portion 706 are disposed. In the ordinary state,the restricting portion 707 is not in contact with the rotary dial 703.The fixed portion 706 is fixed to the chassis 704 to press therestricting portion 707 in the direction toward the rotary dial 703 viaa spring. Then, the user presses the rotary dial 703 into the chassis704 (in the arrow E direction). Accordingly, the rotary dial 703 becomesthe restricted state. On the surface of the rotary dial 703 on therestricting portion 707 side when viewed from the side portion (see FIG.7C), depressed portions 711 are disposed like FIG. 7D. Depression of therotary dial 703 causes the restricting portion 707 and the depressedportion 710 to fit each other as illustrated in FIG. 7C. During rotationof the rotary dial 703, the restricting portion 707 moves between theadjacent depressed portions 710 in the direction vertical to the arrow Ewhile being expanded and contracted by the spring. Accordingly, therestricting portion 707 transitions between discrete states. In thestate where the rotary dial 703 is depressed, a detector 708 is in anon-state and the camera system detects the restricted state of therotary dial 703. While in this embodiment the restricting portion 707 isconstituted in contact with the inferior surface of the rotary dial 703in one position, the restricting portion 707 may be constituted incontact with the inferior surface of the rotary dial 703 in a pluralityof positions. In this case, it is convenient to symmetrically arrangethe restricting portion 707.

FIGS. 8A to 8B illustrate another example of the rotary ring used for adigital camera. In FIG. 8A, a pressure sensitive touch sensor isprovided in a part (bold line part) 804 of the outer periphery of arotary ring 803. In FIG. 8B, an electrostatic touch sensor is providedin a depressed portion 807 of a rotary ring 806. In the case where aplurality of functions is assigned to the rotary ring, it is necessaryto perform an operation using the rotary ring and the function button incombination. However, when the camera is held with both hands, it isnecessary to release the holding hand to depress the button for exertingthe function by the combination. Therefore, shaking of the camera occursand then the photographing quality deteriorates as a result. Since thefunction button in this embodiment is disposed as a part of the ring, itis not necessary to release the holding hand and there is no possibilityof reduction in photographing quality. Compared with the case where thebutton s disposed in the ring, there are fewer causes of shaking, forexample, depression. Thus, this configuration is excellent. Forapplications of this function, it is possible to employ theconfiguration where functions of: zooming at a first speed and zoomingat a second speed when the touch sensor is ON; continuous zooming andstep zooming when the touch sensor is ON; zooming and a focus controlwhen the touch sensor is ON; (continuous) focusing and step focusing(using discrete focus positions of 50 cm, 1 m, 3 in, 10 m, ∞, andsimilar position) are assigned to the rotation of the rotary ring. Here,a touch sensor in another example of this touch sensor is used as theselector switch of the present invention. Accordingly, for example, inthe case of FIG. 8A, when an outer periphery 805 of the rotary ring 803is rotated, discrete values, for example, a change in aperture value canbe assigned. In the case where a rotation is caused while a force with acertain value or more is applied to the outer periphery 804 with thepressure sensitive touch sensor, continuous values, for example, thefocus control can be assigned. In the case of FIG. 8B, when an outerperiphery 808 of the rotary ring 806 is rotated, discrete values, forexample, a change in aperture value can be assigned. In the case where arotation is caused while the outer periphery 807 with the electrostatictouch sensor is touched, continuous values, for example, the focuscontrol can be assigned. The width of this outer periphery 807 can beset to, for example, the width (about 3 mm to 10 mm) and the depth(about 1 to 5 mm) to the extent that the skin of the finger touches thetouch sensor when holding is strong in order to prevent unwantedoperations.

Embodiment 4

FIGS. 9A to 9C illustrate a fourth embodiment of the present invention.This embodiment is an example where the rotary dial of the presentinvention is applied to a waveform monitor 900. In this embodiment, inan ordinary state, an inside peripheral edge 903 b of the rotary dial903 and a restricting portion 907 fit each other. As a discrete state,any function of measuring functions A and B and a result displayfunction C is selected. On the other hand, in the case where a rotarydial 903 is depressed, this fitting state is released and continuousrotation is allowed. For example, in the state where the function of thewaveform monitor 900 illustrated in FIG. 9A is set to the displayfunction C, a measurement data curve 905 measured in the past isdisplayed on a liquid crystal display instrument 901. Regarding anypoint of this curve, an x-coordinate value 910 is displayed at the lowerright side of the display instrument and a y-coordinate value 911 isdisplayed at the upper left side of the display instrument. On thedisplayed waveform, any point is displayed with a black circle 902.Rotating the rotary dial 903 in a depressed state allows moving thedisplayed point 902 on the curve.

The rotary rings to be disposed at a camera main body have beendescribed as examples of the rotary ring according to the presentinvention.

While the embodiments of the present invention have been describedabove, modifications within the scope of the present invention areincluded in the present invention. The above-described embodiments areonly embodiments, and modifications by mutually recombining theconfigurations of the respective embodiments or similar modification areincluded in this application.

INDUSTRIAL APPLICABILITY

Functions that output different types of (continuous or discrete) valuescan be assigned to a switch where a tactile sense during rotation isswitchable and that is mounted on a chassis. This allows achievingreduction in number of components and in size of the chassis. As aresult, this switch is applicable to the use in which downsizing andreduction of operating portions are essential.

DESCRIPTION OF REFERENCE SIGNS

-   100 digital camera-   101 shutter-   102 lens-barrel-   103 rotary ring-   103 b outer periphery-   104 chassis-   105 selector switch-   106 fixed portion-   107 restricting portion-   108 power switch-   109 function button-   117 lens-   118 rotation mechanism-   111 spring-   201 projecting portion-   202 depressed portion-   603 rotary ring-   604 chassis-   606 fixed portion-   607 restricting portion-   703 rotary dial-   706 fixed portion-   707 restricting portion-   710 spring-   803 rotary ring-   804 pressure sensitive touch sensor portion-   805 outer periphery-   806 rotary ring-   807 electrostatic touch sensor portion-   808 outer periphery-   900 waveform monitor-   901 liquid crystal display instrument-   903 rotary dial-   905 data curve-   907 restricting portion-   910 x-coordinate value-   911 y-coordinate value

The invention claimed is:
 1. A digital camera, comprising: a rotaryswitch rotatably mounted in a peripheral area of a lens barrel, whereinthe rotary switch has a plurality of depressed/trough portionsconcentrically arranged with respect to an axis of rotation of therotary switch, a photographing function is assigned to the rotaryswitch, the rotation of the rotary switch is detected, a value isoutputted based on a detected rotation of the rotary switch, and thephotographing function is controlled based on the value; a restrictingmember comprising a mechanical structure configured to press against thedepressed/trough portions in of the rotary switch, and selectivelyengages with the depressed/trough portions during rotation of the rotaryswitch for generating a clicking feel; and a selector switch comprisinga coupling mechanism configured to adjust a force applied by therestricting member against the depressed/trough portions for switchingbetween a restricted state with the clicking feel and a non-restrictedstate free of the clicking feel at a time of photographing wherein therotary switch is configured to rotate without exerting mechanicalcontrol over a mechanism separate from the rotation and the selectorswitch.
 2. The digital camera according to claim 1, wherein the axialdirection is parallel to an optical axis of the digital camera at adirection extending internally from a rear side of the digital camera,and the restricting member is inserted into the depressed/troughportions along the axial direction.
 3. The digital camera according toclaim 1, further comprising a state detection switch configured todetect a selected state based on a position of the selector switch. 4.The digital camera according to claim 1, wherein the photographingfunction is an aperture or a focus.
 5. The digital camera according toclaim 1, wherein the mechanical structure comprises a coiled springconfigured to press a contact point against the depressed/troughportions.
 6. The digital camera according to claim 1, wherein thedigital camera is a lens-integrated type camera.